Igarashi Raito (Tsuna Keito), a municipal worker for 10 years, has lived a stable life under constant pressure to avoid making mistakes in a society where a misstep could trigger a public backlash. One day, a man claiming to be Raito himself and saying he has come from the future, suddenly appears. The man predicts events in Raito’s future one after another―his dreams, work, friendships, relationships, marriage, and family. Raito’s stable daily life begins to waver under the influence of the man’s bold behavior and different values.